Search:

https://www.gov.uk/government/news/over-one-million-half-price-rail-tickets-in-first-ever-great-british-rail-sale

https://www.bbc.co.uk/news/uk-england-51298820

https://media.trainline.com/news-releases/news-release-details/trainline-launches-splitsave

https://www.northernrailway.co.uk/sale

https://www.virgintrains.co.uk/sale

east coast
https://www.virgintrainseastcoast.com/special-offers/deals/sale/

cross country
https://www.crosscountrytrains.co.uk/birthday
20,000 discount codes available on a first come, first served basis. Sign-up required on 2 Nov 2017. Tickets can be bought between 3-6...

east coast
https://www.virgintrainseastcoast.com/special-offers/deals/halfprice/

west coast
https://www.virgintrains.co.uk/sale

East coast
https://www.virgintrainseastcoast.com/special-offers/deals/the-nifty-50-seat-sale/

booked tickets to London sept 29 last week you can get them to email you when tickets go on sale https://www.virgintrainseastcoast.com/travel-information/cheap-ticket-alerts/